X5083PI datasheet(5/20 Pages) INTERSIL

5 / 20 page

FN8127.2

September 16, 2005

To set the new VTRIP voltage, apply the desired VTRIP

threshold voltage to the VCC pin and tie the WP pin to the

programming voltage VP. Then send a WREN command,

followed by a write of Data 00h to address 01h. CS going

HIGH on the write operation initiates the VTRIP programming

sequence. Bring WP LOW to complete the operation.

Note: This operation also writes 00h to array address 01h.

Resetting the VTRIP Voltage

This procedure is used to set the VTRIP to a “native” voltage

level. For example, if the current VTRIP is 4.4V and the new

VTRIP must be 4.0V, then the VTRIP must be reset. When

VTRIP is reset, the new VTRIP is something less than 1.7V.

This procedure must be used to set the voltage to a lower

value.

To reset the new VTRIP voltage, apply the desired VTRIP

threshold voltage to the Vcc pin and tie the WP pin to the

programming voltage VP. Then send a WREN command,

followed by a write of data 00h to address 03h. CS going

HIGH on the write operation initiates the VTRIP programming

sequence. Bring WP LOW to complete the operation.

Note: This operation also writes 00h to array address 03h.

2 3

5 67

SCK

06h

2 3

5 67 8

9 10

20 21 22 23

16 Bits

0001h

02h

VP = 15-18V

00h

WREN

Write

Address

Data

FIGURE 1. SET VTRIP LEVEL SEQUENCE (VCC = DESIRED VTRIP VALUE)

2 3

5 67

SCK

06h

2 3

5 67 8

9 10

20 21 22 23

16 Bits

0003h

02h

VP = 15-18V

00h

WREN

Write

Address

Data

FIGURE 2. RESET VTRIP LEVEL SEQUENCE (VCC > 3V. WP = 15-18V)

X5083

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